If you have good skills and want to give lessons on it then you should start a training or consultancy business online.
You can give training on anything like teaching language or any computer course or any application course etc. You can give medical teachings, if you are good in it, or anything related to art or anything else. There are many things you can teach online. e.g. some Islamic teachers provide their online service to teach you how to read Quran. You can also promote your business by creating a website or a Facebook page or by placing ads in classified sites etc.